Hair-spring-regulating pin for watches



(ModeL) G. F. JOHNSON.

HAIR SPRING REGULATING PIN FOR WATCHES. No. 305,821.

Patented Sept. 30, 1884.

INVENTOR ATTORNEYS.

WITN'ES S N. PETERS. Phnmumu' n imr. Washinmnn. n. c.

UN TED STATES PATENT OFFI E.

GEORGE F. JOHNSON, OF AURORA, ILLINOIS.

HAlR-SPRING-REGULATING PIN FOR WATCHES.

SPECIFICATION forming part of Letters Patent No. 305,821, dated September 30, 1884:.

Application filed April 10, 1884. (Model.)

To all whom it may concern.-

' Be it known that I, GEORGE F. JoHNsoN, of Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Hair- Spring-Holding "Attachments for the Regulators of Watches, of

tional view, upon an enlarged scale, of a watch mechanism in part with the invention applied; and Fig. 2, an under View of the regulator with my improved device applied thereto. Fig. 3 is a vertical longitudinal section, and Fig. 4 an under view, of the regulator, showing my invention under a modified form of construction applied.

In Figs. 1 and 2 of the drawings,A indicates the watch-plate, up through which the balancewheel stair b projects; B, the balancewheel; 0, the hair-spring, andD the regulator,

arranged to embrace, by its curbs or pins 0 c,

an outer coil of said spring, and fitted to work by its eye (Z on the cock or bridge E.

Rigidly attached, as by rivets e or otherwise, to the under side of the regulator,is the device for holding the hair-spring of the watch in position, and for preventing the coils of the spring not embraced by the curbs from catching. Ihis device is in the form of a bent spring, G, the free end of which covers or closes the lower end of the opening between the regulator-pins, whereby the coil of the spring embraced by said pins is prevented from being jarred out, and the other coils of the spring are prevented from being entan-- gled with the pins. By simply pressing down the device or spring G, however, sufficiently for the purpose, the coil of the. hair-spring which the curbs or pins 0 c are designed to control may readily be entered within or removed from between the regulator-pins, as required, without disturbing the regulator-pins, that should be rigid attachn'ients to the regulator.

Instead of the device or spring G being 'a rigid attachment to the regulator, as shown in Figs. 1 and 2, and being adjustable in a downward direction to expose the opening between the outer or lower ends of the pins 0 c, it may, as shown in Figs. 3 and 4, be pivoted to theregulator, as at e, to swing laterally in the manner of a button, for the purpose of entering or removing the controllable coil of the spring within or from between the pins 0 c, and may be retained in a closed position on the exposed ends of said pins, either by forming its inner end with a notched or depressed part arranged to spring over the ends of the pins, or by making said inner end with a projection arranged to drop into notches in the ends of the pins, or, as shown in the drawings, by making the opposite or outer end of the device G with a teat or projection, f, arranged to spring into a notch or countersunk hole, 9, in the under side of the regulator.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The combination, with the regulator D and its curbs or pins 0 c, of the spring G, attached to the regulator, and constructed orarranged to close by its tension on or against the under or exposed ends of the regulator-pins, essentially as and for the purposes described.

GEORGE F. JOHNSON.

\Vitnesses:

WM. H. DAY, M. O. SoUrHwoR'rH. 

